The spin observable for spin 1/2 particles is represented by Pauli Matrices acting upon a 2-dimensional Hilbert Space. In RQM, forgetting about the matter-antimatter duality for the moment, that TWO-state Hilbert Space is directly related, through the Lorentz Group, to the TWO separate differential equations in the Dirac Equation. Is that same "TWO-ness" also found in modern QFT for spin 1/2 particles? Are there TWO separate quantum fields for a spin 1/2 particle in modern QFT? As always, thanks in advance.(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Spin 1/2 in Modern QFT?

Tags:

Loading...

Similar Threads - Spin Modern | Date |
---|---|

I Two dimenstional Heisenberg Hamiltonian for spin 1/2 system | Tuesday at 2:16 PM |

B Spin and polarizations in momentum space | Mar 5, 2018 |

I Macroscopic rotation from spin flipping? | Mar 3, 2018 |

I Spin along x and y axes | Feb 25, 2018 |

A Question while i study Modern Quantum physics by Sakurai | Mar 3, 2017 |

**Physics Forums - The Fusion of Science and Community**